Circuit Diagrams; Main Pwb Circuit Diagram - JVC LT-37DR1BJ Service Manual

CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM (1/13)

5V
DIGITAL/ANALOG
(VHF/UHF) TUNER
L2008
10u
TU2001
QAU0514-001
B1
C2056 C2057
0.1 10
CVBS 24
R2083 0
AS_IF 23
CH
AUDIO 22
C2053
R2079 330 3.3p
2ndIF2 21
R2080 330
2ndIF1 20
R2089
0
+5V IF 19
18
R2082 OPEN
DIF2 17
R2081 OPEN
DIF1 16
IF_AGC 15
R2060 OPEN
REF 14
SDA 13
SCL
12
C2018
0.1
R2086 0
AS 11
WOUT 10
GND 9
C2046 OPEN
Vtu 8
0
R2090
B+(5V) 7
GND 6
FIX PIN FIX PIN FIX PIN FIX PIN RF AGC 5
TU2001
GND
25
C2054
NC 4
OPEN
GND
26
GND 3
GND
27
OPEN
GND R2029
ANT PWR 2
28
TH2001
OPEN
A_GND
NC 1
R2093
0
TU2002
OPEN
CVBS
SIF
AFT
Audio
B+(5V)
C2030
0.1
GND
SDA
SCL
FIX PIN FIX PIN FIX PIN FIX PIN FIX PIN FIX PIN FIX PIN FIX PIN
TU2002
TP
OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN
GND
16
IF AGC
GND
17
DIF2
GND
18
GND
19 DIF1
R2062
GND OPEN
20
NC
GND
21
ANT PWR
GND
22
GND
23 RF AGC
A_GND
R2028 R2027
100 100
MAIN PWB
SDA3
(9/13),(11/13),(13/13)
SCL3
JTAG_TRST
JTAG_TMS
MAIN PWB(11/13)
JTAG_TDI
JTAG_TCK
JTAG_TDO
MAIN PWB
RESET-SYS-DETECT
(5/13),(9/13),(11/13)
MAIN PWB ASS'Y(1/13)
SFY-1008A-H3
R2084 330 C2051 0.01
R2085 330 C2052 0.01
9V
R2031
1k
R2033 C2045
OPEN OPEN
Q2001
ISA1530AC1/QR/X
2SA812A/5-6/-X
R2032
100
R2036
1k
R2034 R2035
0 100
C2026
R2042
0.01
OPEN
Q2002
R2061 R2039
75 ISA1530AC1/QR/X OPEN
2SA812A/5-6/-X C2025
10
R2040 R2043 C2037 C2038
OPEN OPEN OPEN OPEN
NCJ21CK-106X-D
R2037 C2035 R2038
OPEN OPEN OPEN OPEN
Q2003 C2036
OPEN
L2005
OPEN
R2041
OPEN
R2044
OPEN
K2001
R2030 NRSA63J-0R0X
OPEN SHORT
R2057
C2027 C2028
OPEN
0.1 OPEN
IC2002
OPEN
TC7SL04FU-X
R2091
NC VCC
OPEN
IN A
OUT Y
R2092
OPEN
GND
5V
L2001 10u
NQL79GM-100X
B1 NEHL1AM-107X
C2031 C2032
10 100/10
BT
L2002
OPEN
BT MAIN PWB(12/13)
C2034
C2033 OPEN
OPEN
A_GND
R2087 330
R2088 330
(No.YA688<Rev.001>)2-7
R2048
OPEN
R2051
R2045 R2050 OPEN
OPEN OPEN
Q2005
OPEN
L2006
R2047
OPEN OPEN
Q2004 C2043 OPEN
OPEN
C2044 OPEN
C2040
OPEN
C2039
R2046 R2052 R2054
OPEN
OPEN OPEN R2056 R2055
OPEN R2049
OPEN OPEN
OPEN
C2041 R2053 C2042
OPEN OPEN OPEN
Q2006
ISA1530AC1/QR/X
2SA812A/5-6/-X
R2063
OPEN R2066
10k C2048
0.01
R2068
100k
R2065
1k
C2047
0.01
L2007
OPEN
Q2007
R2064
2SC3928A/QR/-X
10k
2SC1623A/5-6/-X
C2049
OPEN 1.2V +1V2DVB
L2003 SHORT
R2076
NRSA02J-0R0X
OPEN
C2021
0.1
C2022
22
NCJ41CM-226X-U
R2074 OPEN
3.3V +3V3DVB
L2004 SHORT
NRSA02J-0R0X
C2023 C2024
0.1 22
NCJ41CM-226X-U
5V
C2020
0.1
10k
R2025
R2026 10k
C2012
0.1
C2013 0.1
0.1
C2014
R2070 OPEN
R2071 OPEN
R2072 OPEN
R2073 OPEN K2002
NQR0499-001X
10k
R2018 OPEN R2019
R2022 OPEN
R2069 0
C2015 0.01
C2016 0.01
C2050 OPEN
C2055 K2003
OPEN NQR0499-001X
2-8(No.YA688<Rev.001>)
NRZ0080-330X
RA2001
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8 9
100
R2016
100
R2017
GND_HS
49
36 35 34 33 32 31 30 29 28 27 26 25
37 TMS DQ4 24
38 TDI DQ3 23
39 TCK DQ2 22
IC2001
40 TOD DQ1 21
TDA10048HN/C200
41 CLR DQ0 20
33 TNR_MICLK
R2007
42 AGC_IF OCLK 19
DVB(COFDM)
R2006 33 TNR_MIVAL
43 AGC_TUN DEN 18
DECODE
R2005 33 TNR_MISTRT
44 VSSIS PSYNC 17
R2004 3.3k +3V3_PER
45 VDDI12 TUN_SCL 16
3.3k
R2003
46 VDDE33 TUN_SDA 15
47 VSA_ANA VSSE 14
R2001
10k
48 VDA_12_ANA VSSIS 13
R2002
OPEN
1 2 3 4 5 6 7 8 9 10 11 12
C2007
0.1
K2004
NQR0499-001X
C2003
0.1
D_GND
TU_CVBS_SCART
L_AUDIO
MAIN PWB(2/13)
CVBS_4
IF_N
IF_P
MAIN PWB
RF_AGC
(11/13),(13/13)
TNR_TSDI7
TNR_TSDI7
122
B5
TNR_TSDI6
TNR_TSDI6
121
A5
TNR_TSDI5
TNR_TSDI5
155
E6
TNR_TSDI4
TNR_TSDI4
154
D6
TNR_TSDI3
TNR_TSDI3
153
C6
TNR_TSDI2
TNR_TSDI2
92
B4
TNR_TSDI1
TNR_TSDI1
91
A4
TNR_TSDI0
TNR_TSDI0
125
E5 IC1001
TNR_MICLK
123
C5 PNX8541E/M12008
TNR_MIVAL
124
D5
TNR_MISTRT
93
C4
TNR_ERROR
151
A6
4/11
MICROCOMPUTER/IF PROCESS/
VIDEO PROCESS/AUDIO PROCESS/
VIDEO SELECT/AUDIO SELECT/
A-D CONVERT/D-A CONVERT/
FROMAT CONVERT
c10611001a003_0204_3/13_0.1